The evolution of lighting

The evolution of lighting

History log the use of oil and candles and gas to provide lighting at night, there was always the risk inherent in the use of open flame for light, came the invention of the electric power in the nineteenth century, it has provided us with a light brighter, as improved means of security and public safety for the people.

And incandescent bulbs are the traditional form of electric lighting so far, where the heats of tungsten metal filament electricity even glow in yellow. And tungsten does not burn but evaporates, resulting in damage to the tungsten filament, so you will not be getting it very effective light; due to evaporation. This has happened in the development of electric lighting sources for the production of lighting a longer lifetime and less heat production.

Lamps quartz (halogen): To protect priming Tungsten damage makes the lamp very young and full of gas, bromine or iodine, which combine ions tungsten in Wick molecules of gas in space cold of the lamp to form a composite spins through the lamp and unite again with this Wick, and the light output a bright yellow color, but it generates high temperatures lead to melting glass lamp normal, so it uses a fused quartz which has a high melting point.

Lamps gases: make this kind of bulbs from a glass tube with electrical wires (electrode) installed at each of the parties to the tube, and Society air extracted from inside the tube and placed his place a very small amount of a specific Gas. When applying a voltage difference between the ends of the atoms ionizes electricity tube gas, ionized gas is a good conductor of electricity, so the electric current which is valid and gas glow.  

And supports the use of lamps GAS the type of gas; as neon gas used in advertising, and uses xenon gas in searchlights and lighting for cameras, sodium gas is also used in street lighting lamps. Gas and gives all the colors, but the installation of lamps be similar to a large extent.

Fluorescent bulbs: a glow caused by mercury vapor is invisible; because most nicely be in the range of ultraviolet light, which is invisible. So make a lamp fluorescent coating the inner surface of the lamp aren’t mercury phosphorus, a chemical element glow when it collides with its ultraviolet light, and made lamps fluorescent any color; changing the mix consisting of red phosphorus g green and blue, the lamps economic, and short-lived; because it produces add a little heat to produce a large amount of light.

Emitting diodes to light: can be emitting diodes to light confiscated to light in the future, which produces diode white light by illuminating screen phosphor is very small inside using a blue light, and give these valves enough illumination to read by which it is also hardly produce heat. These valves are characterized by their efficiency as high a car battery can provide these electric powered lights to work at home for several days without needing to be recharged.